You need to give more information about the device and your application. At the very least a link to a datasheet for the transformer. Preferably a link to a public project that illustrates the usage of this transformer. Please read: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)<br> <br> before posting back. Thanks.